论文标题
快速移动的电动电气气泡墙的流体方程
Fluid equations for fast-moving electroweak bubble walls
论文作者
论文摘要
在扩展的粒子物理模型中，宇宙学电动相转换可以强烈地是一阶。为了准确预测这种过渡期间气泡壁的速度和形状，必须解决CP-even流体扰动的玻尔兹曼方程。我们指出，方程通常会导致扰动的非物理行为，因为墙壁在等离子体中的声音速度附近或高于声音速度。这是一个可以通过更仔细截断完整的玻尔兹曼方程来克服的工件。我们提出了一组改进的流体方程，适合研究亚音速和超音速壁的动力学，这些动力学对引力波产生和电动eak baryogenogeny感兴趣。
The cosmological electroweak phase transition can be strongly first order in extended particle physics models. To accurately predict the speed and shape of the bubble walls during such a transition, Boltzmann equations for the CP-even fluid perturbations must be solved. We point out that the equations usually adopted lead to unphysical behavior of the perturbations, for walls traveling close to or above the speed of sound in the plasma. This is an artifact that can be overcome by more carefully truncating the full Boltzmann equation. We present an improved set of fluid equations, suitable for studying the dynamics of both subsonic and supersonic walls, of interest for gravitational wave production and electroweak baryogenesis.
